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A049840 as a triangular array

1
22
353
4474
571095
66610116
79101414137
881381814158
911913181518179
10101314102020181910
1113161816222524222111
121212121912262021222312

A049840 as a square array

123456789101112
254769811101312
3710610139131612
491014813141812
511141818101619
6131415202212
71518202526
817182420
9192221
102122
1123
12

A049840 as an upper right triangle

123456789101112
254769811101312
3710610139131612
491014813141812
511141818101619
6131415202212
71518202526
817182420
9192221
102122
1123
12

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)